Improvement in apparatus for transferring power



E. B. CLARK.

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'are secured.

UNITED STATES PATENT OEEIGE.

ELIJAH B. CLARK, 0E conoEs, NEW roux, AssieNoE or ONE-HALE nrs EIGHT ToMICHAEL ANDEAE, or sAME PLAGE.

IMPROVEMENT IN APPARATUS FOR TRANSFERRING POWER.

Specification forming part of Letters Patent No. 145,721, dated December23, 1873;` application led April 20, 1872.

To all whom @t may concern:

Be it known that I, ELIJAH B. CLARK, of Oohoes, `county of Albany, State.of New York, have invented certain new and useful Improvements inApparatus for Transferring Power; and I do hereby declare that thefollowing is a description thereof, reference being had to theaccompanying drawings forming a part of this specification, in which-Figure l represents a perspective view of the apparatus embodying myinvention. Fig. 2 is a side elevation of the same. Fig. 3 is a sideelevation of the same, illustrating the several parts in a modiiied formof arrangement. Fig. 4 is a vertical view taken at line No. l in Fig. 2.

My invention relates to certain improvements in apparatus fortransferring power from a continuous revolving driving-shaft to anothershaft, intended to be temporarilydor intermittently driven; and consistsin the arrangement and combination of a spring, a pulley having amovable bearing, and a fixed pulley, lever, and cord, in such a mannerthat the-.said lever will operate the -movable bearing and its pulley inone direction, while the spring will operate the same in the oppositedirection, and the band from the continuous driving-wheel will betighter in its communication with the pulley to be drivenintermittently.

To enable others skilled in the art to make and use my invention, I willproceed to describe it in reference to the drawings and the letters oi'reference marked thereon, the same letters indicating like parts.

In the drawings, A represents any suitable frame-work of a table, orbench, or stand, to which the bearings a a, of the driving-shaft B C isthe driving-pulley, which is intended to be driven continuously bysteam, or other equivalent power. D is the pulley intended to drive themachine to be operated,

which may be a sewing-machine, a boringmachine, or any other, theoperation of which is required to be stopped occasionally, and the saidpulley may constitute a part of the machine to be operated, as is foundin sewingmachines.

Heretofore, the power has been transferred from the driving-pulley C tothe `pulley D by means of frictionclutches placed intermediate betweenthe said pulleys, and arranged with intermediate pulleys or gears whichhave considerable complication oil parts, and are, consequently, quiteexpensive.

In my invention I use any suitable framework, E, which may beconstructed of either wood or metal in whole or part, and of any form toadapt it to the place or circumstances of position of the driving-pulleyC and the driven pulley D, as may be required. To the lower portion oftheI said frame-work E I secure the pulley F, in such a manner that itwill range with the face of the driving-pulley C and the driven'pulleyD, as shown. G is a second pulley, placed above the pulley F, and inrange with same and the driving-pulley C, and is rendered capable ofbeingl moved vertically toward or from the xed pulley F by means of thesliding piece H, to which the spindle or axle of the said pulley G isattached. J is any suitable spring, attached to the frame E or otherequivalent iixed piece, and connected with the sliding piece H carrywilltend to raise the said sliding piece and its pulley G. rlhe said springcan be variously located and connected with the said sliding piece andthe frame-work, or a weighted lever or cord and weight would operatesubstantially the same. c c c c is an endless band or cord, whichconnects with the driving-pulley C and the driven pulley D, afterpassing over the fixed pulley F and movable pulley1 Gr. K is a lever,placed at any convenient place at or near the iloor, 011 which theoperator may plant his foot. s is a cord or rod, attached to the slidingpiece H and the end of the footlever K, as shown.

When the operator presses the lever K down it will operate to draw thesliding piece H down by means of the cord or rod s, when the band orbelt c c c c will be tightened on the several pulleys, so that when thedrivingpulley C is made to revolve with its shaft, the power or motionwill be communicated to the pulley D, which is to actuate the workingmechanism of the machine to be operated. When the operator removes hisfoot from the lever K, the spring J will draw or throw up ing the pulleyG, in such. a manner that it the sliding piece H and its associatepulley G, v

so as to slacken and render the cords c c loose, when the pulley G willYbe lrendered incapable of transferring its motion or power to the pulleyD.

M is a dress-guard, arranged at the front of the frame E, and made tOpass the pulleys F and G, as in Fig. 4, and is intended to protect thedress of the Operator from contact with the said device.

This invention is simple and quite inexpensive, and thoroughly eicientto effect the desired results7 and can be used with advantage withsewing-machines, boringn1acl1ines, or

